The story jumps straight into the action and I cannot wait for what happens next.

Good stuff! I appreciate the edits you made, and I think you have a really good start here. The added description is good, and it's nice to have some more detail. I also like the additional feelings we get from inside her head, for more context to everything going on. If this were a first chapter to a larger story, I would probably expect a bit of a flashback to her recent past so we can hear more about who she is.

Everyone loves a good power trip but for some more depth to the story she needs a motivation. Some dreams and desires to latch onto now that she has abandoned her career, or perhaps you're illustrating the vapid and hollow culture of celebrity worship. In that case, some more characterization and motivation for the worshippers might be the ticket.

Making smut which also has an underlying message is hard to do! I think you've got the beginnings of a good one here, and it's worth exploring deeper rather than wider. Failing that, some good ol destruction is always a crowd-pleaser.

Keep it up!

As someone who just began writing here myself, I have to say it's refreshing to see new talent continuing to take the leap of faith and make the transition from consumer to producer in this community. If you haven't already, edit your account's content preferences to be notified when your stories receive reviews and when your own reviews receive feedback. I'm giving this 5 stars because it's a solid start (and this website has huge review inflation), but it's not perfect and I want to go into depth with my review. I'll separate the sections with an extra space to make it more digestible.

Starting with the things you did well: First, you did a fantastic job of capturing the chaos of a giantess growing in an enclosed space. The writing is chaotic as it leaps between actions and that reflects the nature of the scene. You captured the giantess' mental state and trauma at the sudden development very well. She's not malevolent, but she unwittingly causes great destruction regardless. This trauma extends to the other characters, who react in their own ways. Some are protective, some are terrified, others still are stupefied. Little mini-scenes within the action are great and help paint a picture for readers. 

Along with the plot, your writing fundamentals are solid. You do a good job of keeping your verb tense and perspective consistent. There is a great variety of diction and it's not a chore to read through. This is the most important part of writing and you're nailing it.

Now for some critiques. These aren't necessarily things you did badly, but rather areas where there is room for improvement. After the initial growth sequence out of Madison Square Garden, things get a little messy. First, there is a bit of a missed opportunity to describe the scene of the destruction in detail and the impact this has on the character. Maybe she's frightened by her power. Maybe she's aroused. Maybe something else entirely. Maybe a mix of emotions. Powerful moments like that are great for characterization. Detailed imagery like that gives the character pause and provides a break from the action while also gratifying the audience with a mental picture.

Additionally, the size scales are a little wonky. Our first impression of the protagonist's size after she presumably stops growing (you should explicitly say whether the growth has stopped) is that her hands are "the size of telephone poles." This is not a good frame of reference for a few reasons. For one thing, telephone poles and hands are completely different shapes. It might be better to say her hands are "the length of telephone poles." Precise words for specific dimensions like "length," "width," and "height" help convey scale better.  "Size" is a perfectly suitable word for objects of similar shape or mass, like saying feet are "the size of cars," for example. Furthermore, you should pay close attention to the size of your characters and keep it consistent. The "giantess converter" tool under the "writing tools" section of this website is an imperfect but useful resource. Nobody can perfectly scrutinize the scale of giant women, but it will throw off your readers if your character is stepping on individual cars one moment, then buildings in the next. The scale doesn't really work. So pick a scale for your giantess and keep it consistent. Then also think about what she can realistically do at that size. Would she be talking to people? Would she even notice people? Your giantess can grow, shrink, and oscillate, but those changes should be conveyed clearly to the reader. Otherwise, it just looks like you can't keep track of your characters. Research your size, then research the size of other things as they appear in the story. People, vehicles, buildings, altitudes, planets, whatever.

Use your perspective to your advantage, too. You opted for an omniscient third-person narrator. That perspective has a lot of advantages and disadvantages. You can tell the audience things that the character doesn't know or explicitly say aloud. So far, you have primarily used this perspective to convey characters' thoughts, but this can be accomplished just as well (perhaps even better) in first person. The advantage of third-person narration is that you can tell the audience things that the characters don't know. It's up to you as an author how much you want to reveal. You don't have to tell us the giantess' exact height if you don't want to reveal it, but you have the option to do so. Additionally, you can tell us more of what other characters are thinking and what is happening in the world beyond the protagonist's own limited perception. Again, you don't have to, but I feel like you may be restraining yourself a bit.

Finally, this is just general advice based on your notes: plan out your story. It is totally fine to start a story with a single premise. But a lot of writers, particular gardener-style writers, just skip from premise to premise without thinking ahead. "Oh, my giantess is going to grow inside a building. Now she's going to do a vore scene with a train. Now she's going to swallow a plane." It's a trap. Weave your scenes together. If you're going to develop your character from a sweet girl to a monster, you need to plan ahead how that happens. Don't pull a Game of Thrones Season 8 and make your character just turn evil. Either she was always evil, and this is reflected by her thoughts and actions early on, or she has to be transformed into evil. I see you laying some groundwork already by mentioning some of her temptations, her fragile mental state, and her hunger. This is all solid. I will also remind you that your character doesn't have to become evil. She can be unwittingly destructive. She can battle her impulses and ultimately choose to remain good. She can have a slip-up and rebound back to the light side. It's your story, but plan accordingly. Planning also helps prevent plot holes. If your giantess falls in water early in the story, then gets a call on her phone later in the story, you should have an explanation as to why her phone still works. Planning out your story will allow you to create realistic character arcs, foreshadow future events intelligently, and most importantly of all: resolve your story. So many great stories on this website go unfinished because writers don't know how or when to end them. Don't join their ranks. 

This is a great piece of work with a lot of potential. With a writing outline of a few bullet points, I think it can be great. My criticisms were longer because I wanted to explain them, but you are already a fantastic writer and I could easily fill out many more paragraphs with the stuff you're already doing well. That's simply not as constructive, though. Good work and I hope you'll continue writing.